重子的弱衰变

PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020) Pub Date : 2021-09-24 DOI:10.1063/5.0064217

Z. Tyulemissov, A. Issadykov, K. Nurlan

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引用次数: 0

摘要

我们用三环夸克模型计算了双粲重子Ξcc++和Ωcc+的非轻子双体衰变的W交换贡献。W -exchange贡献出现在可分解树图贡献之外，并且通常不会被抑制。我们利用我们以前开发的协变受限夸克模型来计算树图和W交换贡献。我们计算了螺旋振幅，并定量地比较了树图和W交换的贡献。最后，我们将计算出的衰减宽度与其他可行的理论方法进行了比较。

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Weak decays of heavy Baryons

We have made a three-loop quark model calculation of the W -exchange contribution to the nonleptonic two-body sdecays of the doubly charmed baryons Ξcc++ and Ωcc+. The W -exchange contributions appear in addition to the factorizable tree graph contributions and are not suppressed in general. We make use of the covariant confined quark model previously developed by us to calculate the tree graph as well as the W -exchange contribution. We calculate helicity amplitudes and quantitatively compare the tree graph and W -exchange contributions. Finally, we compare the calculated decay widths with those from other theoretical approaches when they are available.

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PROCEEDINGS OF THE 24TH INTERNATIONAL SCIENTIFIC CONFERENCE OF YOUNG SCIENTISTS AND SPECIALISTS (AYSS-2020)

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